physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
Your bodyâs natural reaction to plaque bacteria in the mouth is swollen gums, which causes them to become sore. Bacteria and gum infections like gum disease are the number one cause of sore gums. Tartar Buildup. When plaque sits on the teeth for around 24 hours, it calcifies into tartar.